This study is part of an ongoing research program aimed at understanding how humans perceive the properties and qualities of everyday objects such as rotary switches. This article reports our measurement of detection thresholds for torque vibrations transmitted through a passively-held rotary switch. We show that the torque thresholds are very similar to published displacement thresholds in tha...

Title of Document: DEVELOPMENT OF SINGLE-MOLECULE FORCE AND TORQUE MEASUREMENT WITH APPLICATION TO NUCLEOSOME DISRUPTION. Jen-Chien Chang, Doctor of Philosophy, 2014 Directed By: Assistant Professor Arthur La Porta, Department of Physics Single-molecule force spectroscopy is a powerful method in biophysical research. The ability of detecting and manipulating single molecule finds applications i...

This paper focuses on three commonly used sensorless methods based on high-frequency signal injection; namely, the rotating sinusoidal injection in the stationary reference frame, the pulsating sinusoidal injection in the estimated synchronous reference frame, and the pulsating square wave injection in the estimated synchronous reference frame. Although these methods have found applications in ...

A key element in the generation of optical torque in optical traps, which occurs when electromagnetic angular momentum is transferred from the trapping beam to the trapped particle by scattering, is the symmetries of the scattering particle and the trapping beam. We discuss the effect of such symmetries on the generation and measurement of optical torque in optical tweezers, and some consequent...

In cycling, the pedalling technique is determined mostly by variations in the torque applied to the pedals during crank rotation. We developed and validated a method to compute these variations from the pedalling motion using an ergometer. The torque at the pedal is the sum of the torques needed to overcome all resistive forces and the torque required for any changes of angular momentum of the ...

Trunk muscle weakness and imbalance are risk factors for postural instability, low back pain, and poor postoperative outcomes. The association between trunk muscle strength and aging is poorly understood, and establishing normal reference values is difficult. We aimed to establish the validity of a novel portable trunk muscle torque measurement instrument (PTMI). We then estimated reference dat...